基于CFD的某远洋围网渔船纵倾节能技术

Research on trim energy-saving technology of purse seiner based on CFD

为响应联合国粮农组织(FAO)提出的“蓝色倡议”和海洋经济可持续发展要求,降低某40 m远洋围网渔船整个营运周期的能耗和运营成本,提高远洋渔船的能效管理技术水平,本研究依托渔船数字化研发平台,基于雷诺平均方程法(RANS),运用计算流体力学(CFD)分析软件STAR-CCM+对该远洋围网渔船不同吃水、不同纵倾状态下的船舶阻力进行仿真计算,分析其阻力的变化规律并寻找不同吃水不同航速下的最佳纵倾角度,针对围网渔船完整营运周期中关键工况点的排水量和航速需求,建立全工况最佳纵倾操作手册和主机功率的经济性选择方案,并通过船舶正浮状态和最佳纵倾状态能耗对比计算验证纵倾优化的实际节能效果。研究结果可为同类型远洋渔船的节能减排优化设计和运营管理提供案例参考。

In response to the Food and Agriculture Organization of the United Nations(FAO)’s“Blue Initiative”and the need for sustainable development of the marine economy,this study aims to reduce the energy consumption and operating costs of a 40 m-long ocean-going purse seine vessel throughout its entire operating cycle to enhance the energy efficiency management technology for ocean-going fishing vessels,this paper relies on the Digital Research and Development Platform of fishing vessels,based on Reynolds-averaged Navier-Stokes equations(RANS),using the computational fluid dynamics(CFD)analysis software STAR-CCM+,the resistance of an ocean-going purse seine fishing vessel under different draught and different yaw conditions was simulated and calculated,based on the analysis of the change law of the resistance and the search for the optimal pitch angle under different draught and speeds,the displacement and speed requirements of the purse seine fishing vessels at the key operating points in the complete operating cycle are discussed,the optimal pitch operation manual and the economical selection scheme of the main engine power are established,and the actual energy saving effect of the pitch optimization is verified by comparing the energy consumption of the ship in the positive floating state and the optimal pitch state.The research results provide theoretical support for implementing energy-saving technology of ocean-going fishing vessel pitch optimization.